Kinetics and mechanism of redox reactions of radical cations of the triphenylamine series with neutral free radicals

1978 ◽  
Vol 13 (6) ◽  
pp. 570-575
Author(s):  
V. G. Koshechko ◽  
V. Yu. Atamanyuk ◽  
V. D. Pokhodenko
Keyword(s):  
Free Radicals ◽  
Redox Reactions ◽  
Radical Cations ◽  
Kinetics And Mechanism

Kinetics and mechanism of redox reactions of U(III) ions with monochloroacetic and dichloroacetic acids

1979 ◽  
Vol 44 (2) ◽  
pp. 401-405 ◽  
Author(s):  
Ľubica Adamčíková ◽  
Ľudovít Treindl
Keyword(s):  
Redox Reactions ◽  
Reaction Rate ◽  
Activation Parameters ◽  
Outer Sphere ◽  
Alcohol Concentration ◽  
Kinetics And Mechanism ◽  
Solvent Structure ◽  
Influence Of Ph ◽  
Sphere Mechanism

The kinetics and mechanism of the redox reactions of U3+ ions with mono- and dichloroacetic acids were studied. The influence of pH was observed mainly in the second case and led to the determination of the rate constants and activation parameters corresponding to two parallel steps, namely oxidation of U3+ with CHCl2COO- ions and oxidation of U3+ with CHCl2.COOH molecules. The influence of binary mixtures of water with methanol, ethanol, isopropanol, or tert-butenol on the reaction rate was followed. Increasing alcohol concentration influences the rate constant not only through changing dielectric constant and solvation of the reactants but also through a change of the solvent structure which plays a role in reactions with an outer sphere mechanism of the electron transfer.

scholarly journals A Novel Cobalt Metallopolymer with Redox-Matched Conjugated Organic Backbone via Electropolymerization of a Readily Available N4 Cobalt Complex

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1667
Author(s):  
Mikhail Karushev
Keyword(s):  
Redox Reactions ◽  
Repeat Unit ◽  
Cobalt Complex ◽  
Radical Cations ◽  
Electrochemical Quartz Crystal Microbalance ◽  
Practical Applications ◽  
Sensing Applications ◽  
Novel Approach ◽  
Redox Switching

Fast and reversible cobalt-centered redox reactions in metallopolymers are the key to using these materials in energy storage, electrocatalytic, and sensing applications. Metal-centered electrochemical activity can be enhanced via redox matching of the conjugated organic backbone and cobalt centers. In this study, we present a novel approach to redox matching via modification of the cobalt coordination site: a conductive electrochemically active polymer was electro-synthesized from [Co(Amben)] complex (Amben = N,N′-bis(o-aminobenzylidene)ethylenediamine) for the first time. The poly-[Co(Amben)] films were investigated by cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM), in situ UV‑vis-NIR spectroelectrochemistry, and in situ conductance measurements between −0.9 and 1.3 V vs. Ag/Ag+. The polymer displayed multistep redox processes involving reversible transfer of the total of 1.25 electrons per repeat unit. The findings indicate consecutive formation of three redox states during reversible electrochemical oxidation of the polymer film, which were identified as benzidine radical cations, Co(III) ions, and benzidine di-cations. The Co(II)/Co(III) redox switching is retained in the thick polymer films because it occurs at potentials of high polymer conductivity due to the optimum redox matching of the Co(II)/Co(III) redox pair with the organic conjugated backbone. It makes poly-[Co(Amben)] suitable for various practical applications based on cobalt-mediated redox reactions.

Elektrochemische Untersuchungen von BEDT-TTF / Electrochemical Investigations of BEDT-TTF

1989 ◽  
Vol 44 (10) ◽  
pp. 1199-1202 ◽  
Author(s):  
Harald Müller ◽  
Heinz P. Fritz ◽  
Anton Lerf ◽  
Jürgen O. Besenhard
Keyword(s):  
Cyclic Voltammetry ◽  
Significant Influence ◽  
Redox Reactions ◽  
Radical Cations ◽  
Scan Rate ◽  
Influence Of Solvent

The electrochemistry of BEDT-TTF+ was investigated by means of cyclic voltammetry in solvents most frequently used for the electrocrystallization of radical cations of this donor. It can be shown that the reversibility of redox reactions is decreasing with the scan rate, with a significant influence of solvent. The results presented allow conclusions about the mechanism of electrocrystallization.

Redox reactions of free radicals with nickel(II) complexes. A pulse radiolytic study

1978 ◽  
Vol 17 (11) ◽  
pp. 3157-3163 ◽  
Author(s):  
P. Maruthamuthu ◽  
L. K. Patterson ◽  
G. Ferraudi
Keyword(s):  
Free Radicals ◽  
Redox Reactions

Redox reactions of metal carbonyls. I. Kinetics and mechanism of disproportionation of Co2(CO)8 with piperidine

1977 ◽  
Vol 22 ◽  
pp. 19-22 ◽  
Author(s):  
P.L. Stanghellini ◽  
R. Rossetti ◽  
E. Mentasti ◽  
E. Pelizzetti
Keyword(s):  
Redox Reactions ◽  
Kinetics And Mechanism ◽  
Metal Carbonyls
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